CVE-2026-54580

Description

mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. This issue is fixed in version 2.7.8.

Is your site exposed to CVE-2026-54580?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-354 CWE-354

CWE-755 CWE-755

References

Other References

https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d https://github.com/MidnightBSD/mport/pull/135 https://github.com/MidnightBSD/mport/releases/tag/2.7.8 https://github.com/MidnightBSD/mport/security/advisories/GHSA-ffqj-j42r-747w

Frequently Asked Questions

What is CVE-2026-54580? +

mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. This issue is fixed in version 2.7.8.

How do I check if I'm vulnerable to CVE-2026-54580? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-59642

In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also …

CVE-2026-12816

In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This issue also affects Bouncy …

CVE-2026-54578

mport is the MidnightBSD Package Manager. Prior to 2.7.8, mport_verify_package() in libmport/verify.c could continue after MD5File() or SHA256_File() failed and …

CVE-2025-4616

An insufficient validation of an untrusted input vulnerability in Palo Alto Networks Prisma® Browser allows a locally authenticated non-admin user …

CVE-2026-75803

Issue summary: ChaCha20-Poly1305 and AES-OCB decryption with an empty ciphertext can report success without verifying the supplied authentication tag when …

CVE-2026-13385

An Improper Validation of Integrity Check Value and Improper Certificate Validation in certain ASUS router models allows a remote man-in-the-middle(MITM) …